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Alpha: forbid transaction of 0ꜩ towards contracts without code

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bruno 2018-05-24 15:05:28 +02:00 committed by Grégoire Henry
parent 2c57e4cce6
commit f000eb70f2
1 changed files with 21 additions and 1 deletions
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22
src/proto_alpha/lib_protocol/src/contract_storage.ml
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@ -14,6 +14,7 @@ type error +=
| Unspendable_contract of Contract_repr.contract (* `Permanent *)
| Non_existing_contract of Contract_repr.contract (* `Temporary *)
| Empty_implicit_contract of Signature.Public_key_hash.t (* `Temporary *)
| Empty_transaction of Contract_repr.t (* `Temporary *)
| Inconsistent_hash of Signature.Public_key.t * Signature.Public_key_hash.t * Signature.Public_key_hash.t (* `Permanent *)
| Inconsistent_public_key of Signature.Public_key.t * Signature.Public_key.t (* `Permanent *)
| Failure of string (* `Permanent *)
@ -165,7 +166,19 @@ let () =
Signature.Public_key_hash.pp implicit)
Data_encoding.(obj1 (req "implicit" Signature.Public_key_hash.encoding))
(function Empty_implicit_contract c -> Some c | _ -> None)
(fun c -> Empty_implicit_contract c)
(fun c -> Empty_implicit_contract c) ;
register_error_kind
`Branch
~id:"contract.empty_transaction"
~title:"Empty transaction"
~description:"Forbidden to credit 0ꜩ to a contract without code."
~pp:(fun ppf contract ->
Format.fprintf ppf
"Transaction of 0ꜩ towards a contract without code are forbidden (%a)."
Contract_repr.pp contract)
Data_encoding.(obj1 (req "contract" Contract_repr.encoding))
(function Empty_transaction c -> Some c | _ -> None)
(fun c -> Empty_transaction c)
let failwith msg = fail (Failure msg)
@ -383,6 +396,13 @@ let spend_from_script c contract amount =
delete c contract
let credit c contract amount =
begin
if Tez_repr.(amount <> Tez_repr.zero) then
return ()
else
Storage.Contract.Code.mem c contract >>= fun target_has_code ->
fail_unless target_has_code (Empty_transaction contract)
end >>=? fun () ->
Storage.Contract.Balance.get_option c contract >>=? function
| None -> begin
match Contract_repr.is_implicit contract with